body {
    background: #000;
    color: #00ff00;
    font-family: 'Courier New', monospace;
    overflow: hidden;
    height: 100vh;
    margin: 0;
}
.matrix-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle, rgba(0,255,0,0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.5;
    z-index: -1;
}
.atm-screen {
    border: 2px solid #00ff00;
    background: #111;
    padding: 20px;
    box-shadow: 0 0 20px #00ff00;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.glow {
    text-shadow: 0 0 10px #00ff00;
}
.button {
    background: #222;
    border: 1px solid #00ff00;
    color: #00ff00;
    padding: 10px;
    margin: 5px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 0 5px #00ff00;
}
.button:hover {
    background: #333;
    box-shadow: 0 0 15px #00ff00;
}
.numpad-button {
    background: #000;
    border: 1px solid #00ff00;
    color: #00ff00;
    padding: 15px;
    margin: 5px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 0 5px #00ff00;
}
.numpad-button:hover {
    background: #222;
    box-shadow: 0 0 15px #00ff00;
}